linux-kernel - [PATCH] f2fs: return success if there is no work to do

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Message-Id: <20210515180941.1751362-1-trix@redhat.com>
Date:   Sat, 15 May 2021 11:09:41 -0700
From:   trix@...hat.com
To:     jaegeuk@...nel.org, chao@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Tom Rix <trix@...hat.com>
Subject: [PATCH] f2fs: return success if there is no work to do

From: Tom Rix <trix@...hat.com>

Static analysis reports this problem
file.c:3206:2: warning: Undefined or garbage value returned to caller
        return err;
        ^~~~~~~~~~

err is only set if there is some work to do.  Because the loop returns
immediately on an error, if all the work was done, a 0 would be returned.
Instead of checking the unlikely case that there was no work to do,
change the return of err to 0.

Signed-off-by: Tom Rix <trix@...hat.com>
---
 fs/f2fs/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index ceb575f99048c..bae0f910f5f0a 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3203,7 +3203,7 @@ int f2fs_precache_extents(struct inode *inode)
 		map.m_lblk = m_next_extent;
 	}
 
-	return err;
+	return 0;
 }
 
 static int f2fs_ioc_precache_extents(struct file *filp, unsigned long arg)
-- 
2.26.3